The genius of Christ's message was not to try to tell you that it's not your fault. He knew you wouldn't believe that. (You were there.) It was to tell you that you are forgiven for the sins you can never redeem yourself. He suggested you rejoice at the news. Repent, sure. But then rejoice.
This is far superior to the current secular religion, according to which you are to blame for things you didn't do and can't prevent, are guilty of things you would never do and will never see undone, and are at the mercy of people without grace. They would have you do the work and despair.